CAT4002BSD-GT3

Overview

The CAT4002BSD-GT3 is a constant current programmable LED driver manufactured by onsemi. It features two independent output channels capable of delivering up to 25 mA per channel. The device supports both boost and buck topologies for flexible LED configuration. It operates within an input voltage range of 2.4 V to 5.5 V and includes internal switches. The IC provides 32 dimming levels and is housed in a compact SC-70-6 surface-mount package. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides two independent constant current output channels for precise LED control
• Supports multi-step dimming with 32 distinct brightness levels via external programming
• Integrates internal power switches to simplify circuit design and reduce component count
• Operates in both boost and buck configurations to accommodate various LED string voltages

Applications

• LED backlighting for portable electronic devices
• General illumination lighting systems
• Indicator lights in consumer electronics
• Low-power LED display segments

Procurement Notes

Verify the specific suffix 'BSD' against the official onsemi datasheet to confirm pinout, thermal characteristics, and packaging details. Ensure the selected variant matches the required operating temperature range and output current specifications for the target application. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability status before finalizing procurement.

Selection Notes

Select this component when a dual-channel solution is required for driving LEDs with constant current. It is suitable for applications needing programmable dimming without complex external controllers. Consider the SC-70-6 package size for space-constrained designs. Verify that the system supply voltage falls within the 2.4 V to 5.5 V range and that the load requirements align with the 25 mA output capability.

Part Context

This part belongs to the CAT4002 series of LED drivers from onsemi. The series focuses on simple, cost-effective solutions for driving single-color or multi-segment LEDs. Variants within the series typically differ by output count, package type, or specific electrical ratings. The CAT4002BSD-GT3 specifically denotes the two-channel version in the SC-70-6 package.

Replacement Considerations

Check for direct cross-references in onsemi's product change notifications. Other parts in the CAT4002 family may offer different channel counts or packages. Verify compatibility with existing PCB footprints if substituting with other SC-70-6 LED drivers from different manufacturers.